铝合金所用铁添加剂中铁含量测定方法的改进

Improvement the method for determination iron content for additive Fe used for Aluminum alloy

重铬酸钾容量法测定铁添加剂中铁含量,常用的方法是用稍过量的氯化亚锡—二氯化汞还原Fe^(3+),用重铬酸钾标准溶液滴定。本文以甲基橙作指示剂,用氯化亚锡还原Fe^(3+),用重铬酸钾标准溶液滴定,通过对比,后者操作更简便,条件易于控制,且无汞污染。

Potassium dichromate volumetric method to determine the iron additive content,The most common method is to use a little too much stannous chloride-mercury chloride reduction ferric ion,with potassium dichromate standard solution titration.This method uses methyl orange as indicator,using stannous chloride ferric iron ion,with potassium dichromate standard solution titration,which is simple,less influence factors,no mercury pollution.